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Locale with ISO 8601 (RFC 3339) date/time format
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friesia
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Joined: 23 Mar 2007
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PostPosted: Fri Apr 05, 2013 11:06 am    Post subject: Locale with ISO 8601 (RFC 3339) date/time format Reply with quote

Is there any system locale with date/time format set to ISO 8601 standard?
I'd like to set LC_TIME variable to that locale.
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khayyam
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Joined: 07 Jun 2012
Posts: 2245

PostPosted: Fri Apr 05, 2013 10:42 pm    Post subject: Reply with quote

friesia ...

I think we discussed this on irc ... anyhow, I probably wasn't as clear as I could be, basically it isn't the locale as such but the d_fmt, date_fmt, etc, supplied by that locale, and iso-8601 isn't a locale but an output method for strftime.

Code:
# LC_TIME="en_GB.UTF-8" locale -k LC_TIME
abday="Sun;Mon;Tue;Wed;Thu;Fri;Sat"
day="Sunday;Monday;Tuesday;Wednesday;Thursday;Friday;Saturday"
abmon="Jan;Feb;Mar;Apr;May;Jun;Jul;Aug;Sep;Oct;Nov;Dec"
mon="January;February;March;April;May;June;July;August;September;October;November;December"
am_pm=";"
d_t_fmt="%a %d %b %Y %T %Z"
d_fmt="%d/%m/%y"
t_fmt="%T"
t_fmt_ampm=""
era=
era_year=""
era_d_fmt=""
alt_digits=
era_d_t_fmt=""
era_t_fmt=""
time-era-num-entries=0
time-era-entries="S"
week-ndays=7
week-1stday=19971130
week-1stweek=4
first_weekday=2
first_workday=2
cal_direction=1
timezone=""
date_fmt="%a %b %e %H:%M:%S %Z %Y"
time-codeset="UTF-8"

We can see from the above that the date_fmt is "%a %b %e %H:%M:%S %Z %Y", as we can see from the following:

Code:
# LC_TIME="en_GB.UTF-8" date
Fri Apr  5 23:51:24 CEST 2013
# LC_TIME="en_GB.UTF-8" date --iso-8601
2013-04-05
# LC_TIME="en_GB.UTF-8" date "+%F %H:%M:%S"
2013-04-05 23:51:29
# TIME_STYLE="iso-long" date
Fri Apr  5 23:51:36 CEST 2013
# TIME_STYLE="locale" ls -l
total 8
-rw------- 1 khayyam users  2 Mar 28 03:51 foo.txt
-rw------- 1 khayyam users  2 Mar 28 03:51 bar.txt
drwx------ 4 khayyam users 92 Apr  3 06:22 baz
# TIME_STYLE="iso-long" ls -l
total 8
-rw------- 1 khayyam users  2 2013-03-28 03:51 foo.txt
-rw------- 1 khayyam users  2 2013-03-28 03:51 bar.txt
drwx------ 4 khayyam users 92 2013-04-03 06:22 baz

We can see from the above that the date output is modified by strftime.

The en_DK locale uses d_fmt and t_fmt of iso-8601 but this won't effect the output of commands (like 'ls' and 'date') using a specific strftime, or using the date_fmt provided with that locale.

Code:
# LC_TIME="en_DK.UTF-8" locale -k LC_TIME
abday="Sun;Mon;Tue;Wed;Thu;Fri;Sat"
day="Sunday;Monday;Tuesday;Wednesday;Thursday;Friday;Saturday"
abmon="Jan;Feb;Mar;Apr;May;Jun;Jul;Aug;Sep;Oct;Nov;Dec"
mon="January;February;March;April;May;June;July;August;September;October;November;December"
am_pm=";"
d_t_fmt="%Y-%m-%dT%T %Z"
d_fmt="%Y-%m-%d"
t_fmt="%T"
t_fmt_ampm=""
era=
era_year=""
era_d_fmt=""
alt_digits=
era_d_t_fmt=""
era_t_fmt=""
time-era-num-entries=0
time-era-entries="S"
week-ndays=7
week-1stday=19971130
week-1stweek=4
first_weekday=2
first_workday=2
cal_direction=1
timezone=""
date_fmt="%a %b %e %H:%M:%S %Z %Y"
time-codeset="UTF-8"
# LC_TIME="en_DK.UTF-8" date
Sat Apr  6 23:52:20 CEST 2013

So, I'm not sure how this can be achived other than changing the date_fmt set in the specific locale, as I don't think there is a locale who's d_fmt, t_fmt, and date_fmt, are entirely iso-8601. Also, I'm not enirely sure what commands will respect this and provide iso-8601 strftime without other variables being set.

Your may have to do something like this.

HTH & best ... khay
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friesia
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Joined: 23 Mar 2007
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PostPosted: Sat Apr 06, 2013 4:17 pm    Post subject: Reply with quote

Ok, I guess i"ll use ja_JP instead of making a custom file, it has big-endian representation at least :)
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